patch-2.1.44 linux/include/asm-mips/dma.h

• Lines: 51
• Date: Thu Jun 26 12:33:39 1997
• Orig file: v2.1.43/linux/include/asm-mips/dma.h
• Orig date: Thu Apr 11 23:49:44 1996

diff -u --recursive --new-file v2.1.43/linux/include/asm-mips/dma.h linux/include/asm-mips/dma.h
@@ -5,14 +5,15 @@
  * and John Boyd, Nov. 1992.
  *
  * NOTE: all this is true *only* for ISA/EISA expansions on Mips boards
- * and can only be used for expansion cards. Onboard DMA controller, such
+ * and can only be used for expansion cards. Onboard DMA controllers, such
  * as the R4030 on Jazz boards behave totally different!
  */
 
 #ifndef __ASM_MIPS_DMA_H
 #define __ASM_MIPS_DMA_H
 
-#include <asm/io.h>		/* need byte IO */
+#include <linux/config.h>
+#include <asm/io.h>			/* need byte IO */
 
 
 #ifdef HAVE_REALLY_SLOW_DMA_CONTROLLER
@@ -74,12 +75,16 @@
 #define MAX_DMA_CHANNELS	8
 
 /*
- * The maximum address that we can perform a DMA transfer to on this platform
- * This describes only the PC style part of the DMA logic like on Deskstations
- * or Acer PICA but not the much more versatile DMA logic used for the
- * local devices on Acer PICA or Magnums.
+ * The maximum address in KSEG0 that we can perform a DMA transfer to on this
+ * platform.  This describes only the PC style part of the DMA logic like on
+ * Deskstations or Acer PICA but not the much more versatile DMA logic used
+ * for the local devices on Acer PICA or Magnums.
  */
-#define MAX_DMA_ADDRESS		0x1000000
+#ifndef CONFIG_SGI
+#define MAX_DMA_ADDRESS		(PAGE_OFFSET + 0x01000000)
+#else
+#define MAX_DMA_ADDRESS		(~0UL)
+#endif
 
 /* 8237 DMA controllers */
 #define IO_DMA1_BASE	0x00	/* 8 bit slave DMA, channels 0..3 */
@@ -275,10 +280,5 @@
 /* These are in kernel/dma.c: */
 extern int request_dma(unsigned int dmanr, const char * device_id);	/* reserve a DMA channel */
 extern void free_dma(unsigned int dmanr);	/* release it again */
-
-/*
- * DMA memory allocation - formerly in include/linux/mm.h
- */
-#define __get_dma_pages(priority, order) __get_free_pages((priority),(order), 1)
 
 #endif /* __ASM_MIPS_DMA_H */